.form-box {
    position: fixed;
    width: 25%;
    height: 70%;
    background: lightblue;
    border-radius: 30px;
    text-align: center;
    top: 13%;
    right: 10%;
}

.login-picture{
    width: 70%;
    position: fixed;
    top: 5%;
    right: 35%;
}

.input-normal {
    width: 220px;
    height: 38px;
    margin: 30px auto;
    padding: 0;
    text-align: center;
    border-radius: 20px;
    outline: none;
    display: block;
    transition: 0.3s;
    border: 1px solid #e6e6e6;
}

.btn-submit {
    width: 100px;
    height: 36px;
    margin: auto;
    font-size: 18px;
    text-align: center;
    color: white;
    border-radius: 20px;
    display: block;
    background: darkslategrey;
    transition: 0.3s;
}
/* 我调整了一下，感觉还不错的样式，你可以改成其他的好看点的 */
p {
    margin: 15px auto;
    padding: 0;
    font-size: 16px;
    color: white;
    display: block;
    text-align: center;
}
a {
    color: aqua;
    cursor: pointer;
}